Reverting to the Previous Configuration After an Upgrade Attempt

In the unlikely event of an upgrade failure, or if you prefer an earlier version of Cisco CallManager, perform the following steps to return the Cisco IP Telephony Applications Server to the configuration that was in effect prior to the upgrade.

Reconfiguring If You Did Not Remove a Drive Before the Upgrade

This procedure assumes that you have a good backup file on a tape device or network directory. For a list of files that the utility backs up, refer to the appropriate backup documentation:

•If you upgraded from Cisco CallManager 3.3, install and configure the Cisco IP Telephony Backup and Restore System (BARS).

Step 5 Perform the necessary upgrade(s) to match the most recent successful backup.

Note To revert to the pre-upgrade configuration, you must restore the version of Cisco CallManager that was in effect when the last successful backup occurred.

Step 6 Restore the data.

Subscriber Server(s)

Step 7 Reinstall the operating system by using Cisco-provided operating system version 2000.2.4 or later.

You must perform this task by using the Cisco-provided disks that shipped with Cisco CallManager Release 4.0(1).

Step 8 Using the disks that originally shipped with Cisco CallManager, reinstall a version of Cisco CallManager 3.2 or 3.3 (depends on the original disks).

Do not install or configure the backup utility that automatically displays during the installation.

Step 9 If you want to do so, install and configure Cisco IP Telephony Applications Backup Utility Version 3.5.52 or later by using the Cisco CallManager Backup Utility Disk that shipped with Cisco CallManager Release 4.0(1).

Step 10 If you want to do so, install and configure the appropriate backup utility by using the Cisco CallManager Backup Utility Disk that shipped with Cisco CallManager Release 4.0(1):

Reverting the Hard Drive After Drive Mirroring Completes

If you want to revert a hard drive after drive mirroring and you have made changes that affect the domain trust relationship, you must remove the server from the domain and then add it back to the domain. You must have rights to join the server to the domain before you perform this procedure.

Procedure

Step 1 Choose Start > Settings > Control Panel > System.

Step 2 Click the Network Identification tab.

Step 3 Click the Properties button.

Step 4 Click the Workgroup radio button and enter WRKGRP in the corresponding field.

After you revert the entire cluster to a previous version of Cisco CallManager, you must revert integrated Cisco IP telephony applications. You must revert these integrated applications to the version that is compatible with the reverted Cisco CallManager. To revert the application, perform the following procedure: